chore: commit missing files

PcgsInv/ViewLocator.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using PcgsInv.ViewModels;
+
+namespace PcgsInv;
+
+/// <summary>
+///     Given a view model, returns the corresponding view if possible.
+/// </summary>
+[RequiresUnreferencedCode(
+    "Default implementation of ViewLocator involves reflection which may be trimmed away.",
+    Url = "https://docs.avaloniaui.net/docs/concepts/view-locator")]
+public class ViewLocator : IDataTemplate {
+    public Control? Build(object? param) {
+        if (param is null)
+            return null;
+
+        var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
+        var type = Type.GetType(name);
+
+        if (type != null) return (Control)Activator.CreateInstance(type)!;
+
+        return new TextBlock { Text = "Not Found: " + name };
+    }
+
+    public bool Match(object? data) {
+        return data is ViewModelBase;
+    }
+}